Greenlee 29451 Slug-Splitter Knockout Draw Stud for Hydraulic Drivers, 7/16 by 4-1/2-Inch For use in Greenlee Hydraulic Drivers 7804 and 7904 Punch and die are required for operation Slug-Splitter SC heavy-duty punches are designed to punch up through 10 gauge (3.5 mm) stainless steel Self-centering punch aligns itself on pilot hole Unique punch profile also splits slugs for easier slug removal